Mold.



PATENTED MAR. 14, -1905.

I 0. A. STEMPEL.

MOLD.

APPLIOATION FILED JUNE 9.1904.

UNITED STATES Patented March 14, 1905.

OMAR A. STEMPEL, OF OLEARWATER, FLORIDA.

MOLD.

SPECIFICATION forming part of Letters Patent No. 784,967, dated March 14, 1905.

Application filed June 9, 1904. Serial No. 211,882.

To ail whom it may concern:

Be it known that I, OMAR A. STEMPEL, aeitizen of the United States, residing at Olearwater, in the county of Hillsboro and State of Florida, have invented new and useful Improvements in Molds, of which the following is a specification.

This invention relates to a mold to be placed around piles, telegraph-poles, and other articles to form a water-tight annular compartment between said article and mold into which concrete is dumped, after pumping out any water which may be in the compartment, to form a protecting-jacket around the pile or pole which will preserve it from decay, penetration by insects, fire, and other causes which lead to rapid deterioration and destruction of said article.

The object of this invention is to provide a mold constructed of two or more parts, united by a water-tight or water-tight hinge or hinges, and having two abutting, compressible, or elastic closing surfaces which are held in closecontact when in operative position by means of a sliding clamp engaging flanges on the mold.

. The main feature of the invention resides in the simple, easy, and practical manner by which piles driven in water and covered at their upper ends and old piles beneath a pier or wharf may be covered with a protective coating of concrete from bottom to top at slight cost I and in a most perfect manner through the use of the novel form of separable or hinged mold to be hereinafter more fully described.

1n the accompanying drawings, Figure 1 represents an elevation of a pile standing in water beneath a pier or deck with the improved mold in place around the pile. Fig. 2 is an elevation of the mold looking in the direction indicated by the arrow A, Fig. 1. Fig. 3 is a similar view of the mold from the opposite direction. Fig. 4 is an enlarged plan view of the mold, showing the means for closing the mold around a pile. Fig. 5 is a perspective view of two sections of the clamp or union for holding the mold closed. Fig. 6 is a detail perspective view of a modified form of the clamp or union.

Similar numerals of reference indicate corresponding parts throughout the several views.

The numeral 1 indicates one of a number of piles driven into the ground below a body of water through which it passes to assist in supporting a pier or dock 2.

The numeral 3 indicates a cylindrical mold adapted to be opened and placed around that portion of a pile below water, then closed, and fastened in a water-tight manner. The mold, comprises two or more hinged sections 1, two sections of semicylindrical form being shown in the drawings. The sections 4 are longitudinally connected at one edge by aflexible yielding water-tight hinge 5, preferably of rubber, (see Figs. 3 and 4,) which extends the full length of the sections and is attached thereto by a longitudinal metal strip 6, riveted to each section, the rivets passing through the flexible hinge 5. As thus joined, the sections may be easily opened and closed, and when closed it is impossible for water to pass through the hinge. The opposite edge of each section 4 is provided with an elastic or compressible packing strip 7, preferably rubber, which packing-strips when brought together and held form a water-tight joint. 'lhepreferred form of closure is just shown in the drawings and comprises a plate 8, riveted to each section 4, between which and said plate the rubber packing-strip is secured in position by the rivets, as shown. plate 8 is turned outwardly to form a lip 9 to be engaged by a sliding union or clamp 10. The preferred form of union is shown most clearly in Fig. 5 and consists of a plurality of short sections 11 of sheet metal connected by hinged joints 12, each section having its side edges bent to form guideways 13, which register with similar guideways on the other sections when the union or clamp lies in a straight line. To apply the union or clamp 10, the sections 4 of the mold 3 are placed around a pile, for instance, and the rubber packingstrips 7 brought into contact. One end section 11 of the union 10 is then slipped over the lips 9, which latter enter the guideways 13 and press the packing-strips 7 into close I contact. As soon as one section of the clamp The inner end of each or union has been placed the succeeding one is raised to position and pushed down on the lips 9 (see Fig. 1) until the entire clamp or union 10 is in place. It will thus be seen that the mold 3 is lirmly closed about the pile and all places where water could enter, as at the hinge-joints and the closed edges, are sealed. The n'iodiiication of the -union or clamp, as disclosed in Fig. 6, resides in constructing the same from a single blank of metal of a length equal to that of the mold and bending the longitudinal edges of the blank to provide guideways 13, adapted to receive the lips 9. This form of clamp or union may be used for uniting the sections of the mold about telegraph and other poles not supporting structures which would interfere with its application. The mold at this stage is in condition to be forced into the ground, which is done in any suitable manner, the distance to which it is driven depending upon the nature of the soil or bed of the river, bay, ocean, or other body of water in which the pile stands. After entering the ground the mold having been previously centered with respect to the pile is freed fIOHL water by pumping and then filled with a concrete mixture of sand and cement as the principal ingredients. The mold remains in position until the concrete has set or hardened. The clamp or union 10 is then disconnected from the mold by drawing it up, a handle 14 being provided on the upper section ll for raising the first section. After removing the clamp or union the mold is withdrawn from the ground and opened by means of handles 15 on the mold-sections4: and removed from the pile, leaving it with an impervious coating of cement which, if in salt water, fully protects the pile from the ravages of teredos, waterbugs, and other destructive insects if it be wood and from rust if of iron. Should the pile be in fresh water, decay is prevented by means of the cement shell.

It is known that piles have been inclosed in riveted water-tight molds, the latter being pumped out and lilled with concrete, the mold remaining around the concrete until destroyed by the water. This is an expensive operation when applied to piles open at the top, but is practically useless in the case of covered piles. The mold hereinabove described and subject of the presentapplication is formed in sections vertically hinged by a flexible but water-tight material and having its uniting edges properly packed and held in closed position by a jointed clamp or union which enables the mold to be placed around any pile irrespective of its position relative to an overhead covering or other means on a pile which would prevent a permanently-closed tube from being placed thereon.

Having thus fully described the invention, What is claimed as new is 1. A mold for the purpose specified, comprising sections flexibly joined to form the mold-body, the meeting edges of two of the sections being separable to allow the mold to open, and a jointed connection for fastening said separable meeting edges together.

2. A mold comprising a plurality of watertight hinged sections,packing on the free edges of two of said sections, and a jointed connection for clamping and holding the free edges of said sections together.

3. A mold comprising a plurality of Watertight hinged sections, packing on the free edges of two of said sections, a lip outside the elastic packing, and a jointed connection for engaging said lip to hold the mold closed.

4:. A mold comprising a plurality of sections joined by water-tight connections, packing on the free edges of two of said sections, a lip on each of said sections, outside of said packing, and a flexible connection of a length equal to said sections adapted to engage said lips and hold the mold closed against the entrance of water.

5. A mold comprising a plurality of sections having their edges joined by flexible watertight connections, one of said connections being separable, and a jointed sliding union or clamp for holding said separable connection closed.

6. A mold for the purpose specified, comprising jointed and folding sections,and aflexible jointed union or clamp movable into and out of engagement with the meeting edges of the two mold-sections.

7 Amold comprising a plurality of sections having their edges joined by flexible Watertight connections, packing on one edge of two abutting sections, a lip on each of said edges extending the full length of the section outside of said packing, and a jointed clamp or union adapted to be placed over said lips.

8. A mold comprising a plurality of sections united at their sides by flexible material, pack-' ing secured to the free edges of the two abutting sections, a lip on each of said free edges outside the packing and extending from end to end of said section, and a clamp or union formed of jointed sections, each section having a guideway on each side adapted to engage the lips on the mold.

9. A mold comprising a plurality of sections hinged together by flexible material,and adapted to be folded to form an inclosed chamber, packing on the abutting edges of the outer ITO 11. A flexible mold separable at one side Intestimony WhereofIafliX mysignaturein and having locking-lips extending the length presence of two Witnesses. of the mold, packing between the meeting edges of the mold, and a jointed sectional 5 clamp or union, having Ways adapted to inter- Witnesses:

lock With the mold to hold the meeting edges S. P. HOLLINGSWORTH, together. GEORGE M. BOND.

OMAR A. STEMPEL. 

